Rotary hydraulic brake machine



Sept. 7, 1954 w. MGLAUGHUN ETAL ROTARY HYDRAULIC BRAKE MACHINE 2 Sheets-Sheet l Filed Dec. 29, 1952 l y life,

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Sept 7, 1954 w. MCLAUGHLIN ErAx. 6889385 Komm' fIYYDRA-umc BRAKE M AcmNE Filed Dec. 29, 1952 2 Sheets-Sheet 2 ATTIIRNFYS Patented Sept. 7, y1954 .ROTARY HYDRAULIC BRAKE MACHINE William McLaughlin and James W. y y. Smitheldyla.

Loughner,

Application December 29, 1952,' Serial No. 325 5 ,28(l A' I- f 5 Claims.

This invention relates toa brakefmechahism, and more particularly to a hydraulic` brake mechanism for controlling rotation of a shaft.

The object of the invention is to providea brake 'mechanism whereby a braking action Acan apply to a rotating shaft to control the speed of the shaft or completely stop the rotation of the shaft'.-

l Y I Another object of the invention is to'provide a rotaryfhydraulic'brake lwhieh may be used in a vehicle, motor, or any other lcalitywhereby a braking action isto -be `applied to a rotating shaft, there being a means fr adjusting the operation ofthebrake.' j l A further object of the linvention is to provide a rotary hydraulic brake which is extreinelysim` ple and inexpensve'to manufacture,V Other'objects' and advantageswill 'be apparent during the courseof thefollowing description.

In the accompanying drawings, forming apart f, this eprlieetiengand irrfwhieh like lrrumerels are used to designate like `'parts throughout the same: Y t. Figure 1 s a side elevationalview the rotary hydraulic brake of the present invention Figure 2 @Se eeetienelviewteken. en'thelin'e ,2-2 QfFigure 1. il Figure 3 is a longitudinaljs'ectional view taken throughthe hydraulic blkefQfthe Present, I1V tion. ,'w,. I' 1;.1, I

Figure 41s sideelevanohal `View''tf'ultimare, I

with parts broken [away and'insection Figure 5 is fa Vsectional view ike' 5-5 OfFigureg j' i FigureA isa perspectlve yi; theendpieces. A .j l Figure 7 is anjelevational view showing'ith'e parts in exploded ordi'sasseinbled position.`

Figure 8 is a perspective' viewv of the rotor. Figureg is a perspective view of one of the Figure 10 is a perspective view o'fffneofv the slidingvanes. i "i Referring in detailftoithejdrawings, the n u.- meral I0 designates ashaft whichfray be o' tated or driven by any suitable powerj source such as a motor or a vehicleengne, 'andthe-present invention is directed to a brake` rnecshanism` for4 controlling therotation of thei shaft Ill. The brake mechanism of the presentfinvention ini cludes a rotor Il; Figures, and th" jotor .INI rin cludes a cylindrical hub I 2 f that' jcircumpo'sed on the shaft II). T h' hu I2 lis'provif'l'ed with an interiorV slot forree ing 'a key I5, 'Figure 5, Whi'ebyth :Iotrll' 'cfn rvbe@kydte-tfleeslllft (Cl. 18S-90) I0. Thus,` as'the 'shaft I0 rotates the rotorv IIl will rotate therewith. Extending outwardly from the cylindrical hub `I2 `and secured thereto or formed integral there' withV is a pluralityof wings' I6 and the wings I6 are spaced apart to dene therebetween a passageway vI'I'. Reciprocably or slidably mounted in' each of the passageways I'I between the'wings I6 is a vane or block I8, and the ends IS of the' blocks" I8l 'are inclinelor beveled for a purpose to be later described.` e f A housing surrounds the shaft IIJ and rotor vI I, andthe housing includes a pair of end piecesA 20, Fgure "Each ofthefend' pieces Zihcludes an annular sidewall I2'I and an end wall v22. A packing'gland 23 rextends from each of the end walls 22, and th`e"`shaftl0 extends through the packing 23.@ Interposed between the pair of end pieces 20`is a casing rc'ollar-24 which is annular shape. Arranged onopposite sidesof the rotor I'I is"a`pairo`f discs 25, vFigure Each f" the'dis`cs' 2 5 includes an annular flange 25 whichis snuglyfpo'sitionel between the meeting edges' of the casingzdand the end pieces 22, "Ihe inner'surface of each of the discs 25"is"po vided with a' caniand the'can includes a flow 'piiit`2'l anda high point ,28. Furtherjea'ch of the discs 25v is prvidedwith an outletdport 30 and an inlet port ia'thefinlet port l2.11 b eing` j ar ngfed'tangularly or'inclined as shown in Figure 3.V "The cam'fi'nludingf the high `28 and the low 2'I vis adapted'tobefengaged by the ends I9 ofthe iibfvinrvanesii f A e,

'A ineens is prbvided 'fr maiiitaining th parts of )the "housingl connectedwtogether, and this Ii'geans'oompris'es elongated bolts 3I which extend through the end VpiecesZZ and through the` flanges 2G 4arid through`- the casing 24, and suitable nuts 32" are arranged in threaded engagement with theprojecting ends Vo f the 'bolt s 3 I Furthermore, greens' epreYifded Arfer Centrelling the '110W ef hydraulic luidjthroughfthe voutlet openings 3E! the disshgtand this Vlast named means com Dreee' e plus tivhiehhee e'ihreeded portion 34 arranged in threaded engagementwith each of the endwalls 2 2 n valve member orushell v35 'isarranged in threaded engagement with each of the discs 25, and the valve member 3 5 includes a dischargeopening 5 The inner endof'the plug 33 i s mountedfor movement into and out of bridging relation or closing relation with respect to the discharge ropening 3 6. Thus, by rotating th'plug 3? in" the'end'wall 22, the size of the discharge opening 3B and consequently therate of'now'of `hycuauuc uuid through th pr't s'u'ean be controlled so that a means is provided for regulating the action of the brake mechanism.

The numeral 3l designates a suitable support for bearings 38 which are connected thereto by bolt and nut assemblies 39, and the shaft I D may extend through the bearings 38. A brake band 40 surrounds the casing 24, and the brake band 40 has mounted on its inner surface a lining 4I which is mounted for movementI into and out of frictional engagement with the outer surface of the casing 24. A lever 42 is connected to one end of the brake band 40, and a suitable rod or cable 43 may be connected to the lever 42 for actuating the brake band 40. A rod 44 has a coil spring 45 circumposed thereon, and the coil spring 45 serves to normally maintain the brake 4I] in its off position. A washer 46 is positioned adjacent each of the ends of the hub I2.

In use, the housing is filled with a small quantity of hydraulic fluid and the shaft I may be driven by any suitable motor or engine. Then, to control the speed of rotation of the shaft I0 or to stop the rotation of the shaft I0, pressure is applied to the rod 43 by any suitable means and this causes the brake band 4I) to move the band 4I into frictional engagement with the casing portion 24 of the housing. Depending on how much pressure is applied to the brake band, the rotation of the casingl 24, end pieces 20, and discs 25 will be stopped completely or slowed down so that only the shaft I0 and rotor I I will continue to rotate. As the rotor II turns, the vanes I8 will be constantly moved back and forth between the wings I6 due to the fact that the high points 23 and the low points 21 of the cam surfaces engage the ends I9 of the movable vanes I8. Thus, it will be seen that by holding the discs 25 stationary or by holding the discs 25 under slight frictional pressure so that the discs 25 do not rotate as fast as the rotor II, the hydraulic fiuid will be constantly compressed between the wings I6 and this hydraulic fluid under pressure will be forced out through the ports 30 in the discs 25. Thus, passage of the hydraulic fluid through the restricted ports 30 provides that there will be a braking action exerted on the rotating shaft I0. At the same time, hydraulic fluid is passing through the ports 29 into the interior of the discs so that the cycle is continuous.

The brake mechanism of the present invention can be used on any machine in which a drive shaft is utilized. It will be seen that the parts are so arranged that hydraulic fluid or oil is flowing out through one of the ports 30 while the hydraulic fluid is flowing in through the other port 29. The plugs 33 can be adjusted to control the rate of flow of hydraulic fluid through the discharge opening 36. When the brakes are applied, as by means of the lever 43, the sliding vanes I8 will engage the cam surfaces to pump out the oil through the openings 30. Since the flow of hydraulic uid through the port 30 and discharge opening 36 is through a restricted opening, a braking action will be exerted on the rotating shaft. It will be noted that the braking mechanism of the present invention is double acting in that there are provided two of the discs 25.

We claim:

l. A hydraulic brake for a shaft comprising a rotor keyed to the shaft and including a cylindrical hub, a plurality of wings extending from said hub and spaced apart to provide radial passage- Ways, a vane slidably positioned in each of said passageways, a housing positioned on said shaft and including a pair of end pieces each including an annular side wall and an end wall, a cylindrical casing interposed between said pair of end pieces and having the same outside diameter as said side walls, and a pair of discs arranged on opposite sides of said rotor, each of said discs including an annular flange interposed between said casing and the corresponding end piece, there being an outlet port andan inclined inlet port in each of said discs, the inner surface of each of said discs being shaped to provide a cam surface having high and low points, there being a central recess in the inner surface of each of said discs for receiving the ends of said hub, a'packing gland extending outwardly from each wall of said end piece, bolt and nut means for maintaining the parts of said housing connected together, a brake band surrounding said casing, a lining connected to the inner surface of said brake band.

2. The apparatus as described in claim l, and further including a lever for moving said brake band and lining into engagement with said. casing.

3. The apparatus as described in claim 1, and further including a coil spring for maintaining said brake band in its olf position.

4. A hydraulic brake for a shaft comprising a rotor keyed to the shaft and including a cylindrical hub, a plurality of Wings extending from said hlub and spaced apart to provide radial passageways, a vane slidably positioned in each of said passageways, a housing positioned on said shaft and including a pair of end pieces each including an annular side wall and an end wall, a cylindrical casing interposed between said pair of end pieces and having the same outside diameter 'as said side Walls, and a pair` of discs arranged on opposite sides of said rotor, each of said discs including an annular flange interposed between said casing and the corresponding end piece, there being an outlet port andan inclined inlet port in each of said discs, the inner surface of each of said discs being shaped to `provide a cam surface having high and low points, there being a central recess in the inner surface of reach of said discs for receiving the ends of said hub, a packing gland extending outwardly from each wall of said end piece, bolt and nut means for maintaining the parts of said housing connected together, a brake band surrounding said casing, a lining connected to the innersurface of said brake band, a valve member arranged in threaded engagement with each of said outlet ports and provided with a discharge opening, and a plug threadedly engaging said end pieces and mounted for movement into and out of bridging relation with respect to said discharge openings.

5. In a hydraulic brake for a shaft, a rotor keyed to the shaft and including a cylindrical hub, a plurality of wings extending from said hub and spaced apart to provide radial passageways, a vane slidably positioned ineach of said passageways, a housing positionedon saidshaft and including a pair of end pieces'each including an annular sidewall and auf end wall, a cylindrical casing interposed between said pair of end pieces and having the same outside diameter as said side walls, and a pairv of discs arranged on opposite sides of said rotor, ,each of said discs including an annular flange interposed between said casing and the corresponding end piece, there being an outlet port and an inclined inlet port in each of said discs, the inner surface of each of said discs being shaped to provide.` a cam surface having=high and low points References Cited in the le of this patent UNITED STATES PATENTS Name Date Beard Feb. 22, 1927 Number Number 6 Name Date Petersen Jan. 14, 1930 Chisholm Nov. 1l, 1930 Corbin, Jr. May 31, 1938 Van Lammeren May 16, 1939 Carson et al Jan. 2, 1940 Neal Dec. 17, 1940 Dick May 6, 1941 James, Jr. Nov. 16, 1943 James Feb. 21, 1950 Carey Apr. 7, 1953 

